how add my photos to background selection?

I have this scene with an open window I want to put a sky photo behind it as background, but when I do file>import>background it cannot find my photo collection. I looked in the Manual and find absolutely no help. perhaps here someone has solved this problem?

File, Import, Background should give you an option to browse to your photograph. What do you mean it can't find it? You need to manually point to it.

NICE thought, chia, and I'm trying but...how can I pinpoint and capture the named photo?

To locate 'DSC_0005.jpg', you should be aware of its location once you connect your camera or SD card. An embedded name or title won't show up in a search unless the file has been renamed. Considering the dimensions of the image, it may be too large for Poser. For a background photo, resizing for a window render isn't possible. Instead, you should place the photo on a flat plane and position it behind the window prop.

Here's examples of what Rhia said

To add to RedPhantom's excellent screenies: you need to single click on Import, then single click on Background picture; then doubleclick on the picture from your list of images to select it when you have it and you need to single click on the YES button on the last screenshot.

Also, although we are both PC users, I doubt it works differently on a MAC.

When you want to see the background picture in the render, you will also need to hide the GROUND object.